Display device with conductive wire and light-shielding pattern having different curvatures

ABSTRACT

A display device includes a first substrate, a second substrate, a display medium layer, and a light-shielding pattern. The second substrate includes a conductive wire. The display medium layer is disposed between the first substrate and the second substrate. The light-shielding pattern is disposed between the first substrate and the second substrate. The conductive wire is projected onto the first substrate along a first direction to obtain a projected line. The projected line includes a first border. The light-shielding pattern includes a first edge. The first edge includes a first curving rim. The first curving rim is adjacent to the first border.

This application is a continuation application of co-pending applicationSer. No. 14/476,774, filed on Sep. 4, 2014, which claims the benefit ofTaiwan application Serial No. 103122938, filed Jul. 3, 2014, the subjectmatter of which is incorporated herein by reference.

BACKGROUND Field of the Invention

The disclosure relates in general to a display device, and moreparticularly to a display device with conductive wire andlight-shielding pattern having different curvatures.

Description of the Related Art

Today, electronic products with displays, such as smart phones, tabletpersonal computers (i.e. tablet PC, flat PC, ex: iPad), laptops,monitors, and televisions, are necessary tools for work and leisure inthe daily life. Liquid crystal display (LCD) is the most popular displayin use. LCD possesses the excellent characteristics such as compact insize, light weight, easy to carry, having reasonable price, higherdisplay quality and operation reliability. Also, viewer's eyes feel muchmore comfortable looking at a LCD. Older cathode ray tube (CRT) monitorshave been replaced by LCDs. Currently, LCDs provide a versatile choicein sizes, shapes and resolutions for the consumer.

The important factors for manufacturing a qualified LCD includes notonly the details in procedures such as accurate patterning steps (ex:lithography and etch) without breaking conductive traces, but also theelectrical performances such as the resistance, capacitance meeting therequirements of the product, thereby producing the display with goodreliability. The faulty design of the display will lead to the decreasesof the yield and reliability of production.

SUMMARY

The disclosure is directed to a display device having a particulardesign of conductive wires, and the display device comprises theconductive wires and the light-shielding pattern having correspondingcurved portions with different curving tendencies. More specifically,the display device for example can be a liquid crystal display. In oneembodiment, the opposite sides of the curved portion of the conductivewire have different curvatures. When a voltage is applied to the LCD,more LC molecules corresponding to the side with less curving tendency(ex: gentle curving-inward side) rotate, thereby increasing thebrightness of the LCD and improving the display quality of the productin the application. Although more LC molecules at the areas behind thegentle curving-inward side of the curving portion are twisted with largeangle so as to increase the brightness of those areas, the increase ofhorizontal component of alignment also leads to the inconsistence ofalignment directions of the LC molecules; therefore, the press stabilityof the area behind the gentle curving-inward side is poor. When the areawith poor press stability of LCD is touched by the finger or anyexterior object, the region of dark fringes become larger, so that therotation of the LC molecules at this region are fixed and can not bewell controlled by the electric field during the operation. Thus, theareas with poor press stability can be shielded by the light-shieldingpattern of the embodiment in the practical application.

According to one embodiment of the disclosure, a display device isprovided, comprising a first substrate, a second substrate, a displaymedium layer, and a light-shielding pattern. The second substratecomprises a conductive wire. The display medium layer is disposedbetween the first substrate and the second substrate. Thelight-shielding pattern is disposed between the first substrate and thesecond substrate. The conductive wire is projected onto the firstsubstrate along a first direction to obtain a projected line. Theprojected line comprises a first border. The light-shielding patterncomprises a first edge. The first edge comprises a first curving rim.The first curving rim is adjacent to the first border.

The above and other aspects of the disclosure will become betterunderstood with regard to the following detailed description of thepreferred but non-limiting embodiments. The following description ismade with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top view of a FFS mode LCD according to the first embodimentof the present disclosure.

FIG. 2 is a cross-sectional view of a LCD taken along thecross-sectional line A-A of FIG. 1, which merely depicts relativepositions of data lines, the pixel electrode PE, the common electrodeCom and a light-shielding pattern BM.

FIG. 3A illustrates a pattern of the common electrode of the simulationtest according to the first embodiment of the disclosure.

FIG. 3B illustrates a pattern of the common electrode of the simulationtest according to the second embodiment of the disclosure.

FIG. 3C shows the distributions of the gray scales and relativepositions according to the common electrodes of the first and secondembodiments of the disclosure.

FIG. 4 is an enlarging drawing of the circling area of FIG. 1.

FIG. 5 is a top view of a display from the back side of a substrate,which illustrates the display having color resists, conductive wires anda light-shielding pattern according to one embodiment of the disclosure.

FIG. 6 is an enlarged view of the rectangular area denoted by the dashedlines of FIG. 5.

FIG. 7A depicts a first substrate corresponding to the curving potion inthe circled area of FIG. 6.

FIG. 7B depicts a second substrate corresponding to the curving potionin the circled area of FIG. 6.

FIG. 8 is an enlarged view of a curved portion in the circled area 30 ofFIG. 6.

FIG. 9 is an enlarged view of a light-shielding pattern and a projectedline of the conductive wire according to an embodiment of thedisclosure.

FIG. 10 is another enlarged view of a light-shielding pattern and aprojected line of the conductive wire according to an embodiment of thedisclosure.

DETAILED DESCRIPTION

In the embodiment of the present disclosure, a display device forexample a liquid crystal display (LCD) is disclosed by providing theparticular design of conductive wires, and the opposite sides of thecurved portion of the conductive wire (such as the electrode) havedifferent curvatures. In one embodiment, a curved portion of anelectrode comprises a convex border and a concave border opposite to theconvex border, and a curving tendency of the concave border is smallerthan a curving tendency of the convex border; for example, the concaveborder is an arced border. When a voltage is applied to the LCD, more LCmolecules corresponding to the concave border rotate, thereby increasingthe brightness of the LCD. The embodiment of the present disclosure canbe widely used in various applications, such as applied to a FFS (fringefiled switching) mode LCD.

The embodiments are described in details with reference to theaccompanying drawings. It is noted that the details of the structures ofthe embodiments are provided for exemplification, and the describeddetails of the embodiments are not intended to limit the presentdisclosure. The identical and/or similar elements of the embodiments aredesignated with the same and/or similar reference numerals. It is notedthat not all embodiments of the invention are shown. Modifications andvariations can be made without departing from the spirit of thedisclosure to meet the requirements of the practical applications. Thus,there may be other embodiments of the present disclosure which are notspecifically illustrated. Further, the accompany drawings are simplifiedfor clear illustrations of the embodiment; sizes and proportions in thedrawings are not directly proportional to actual products, and shall notbe construed as limitations to the present disclosure. Thus, thespecification and the drawings are to be regard as an illustrative senserather than a restrictive sense.

FIG. 1 is a top view of a FFS (fringe filed switching) mode LCDaccording to the first embodiment of the present disclosure. FIG. 2 is across-sectional view of a LCD taken along the cross-sectional line A-Aof FIG. 1, which merely depicts relative positions of data lines DL, thepixel electrode PE, the common electrode Com and a light-shieldingpattern BM. Please refer to FIG. 1 and FIG. 2. The common electrodeCorn, such as a patterned ITO, is disposed above the pixel electrode PE,and an insulating layer IL is formed between the common electrode Comand the pixel electrode PE. An interlayer dielectric layer IDL isfurther formed under the pixel electrode PE, and a lower substrate S1 ispositioned beneath the interlayer dielectric layer IDL. The pixelelectrode PE is a full conductive plate, while the common electrode Comis a patterned conductive plate. LC molecules are twisted along thefield direction of the electric field generated between the commonelectrode Com and the pixel electrode PE. A light-shielding pattern(such as black matrix) BM is formed on an upper substrate S2 forseparating different color resists, and is also positioned right abovethe data lines DL for shielding the data lines DL. FIG. 2 shows onestructure of the FFS mode LCDs according to the embodiment. Analternative structure of the FFS mode LCD according to the embodiment issetting the pixel electrode PE above the common electrode Com, whereinthe pixel electrode PE is a patterned conductive plate and the commonelectrode Com is a full conductive plate, and a planarization layer andan interlayer dielectric layer IDL are disposed beneath the pixelelectrode PE. It is noted that the embodiments of the disclosure can beapplied to any type of structures of the FFS mode LCDs.

In the first structure of the FFS mode LCDs, as shown in FIG. 2, theshape of the common electrode Com is determined based on the generatedoptical effect of the LCD. One of the shapes of the common electrode Comof the embodiment is shown in FIG. 1, which depicts the common electrodecorresponding to plural sub-pixels. The patterned common electrodecomprises plural chevron-shaped electrodes, and each of thechevron-shaped electrodes has a bending portion with a curving-inwardside and a curving-outward side opposite to the curving-inward side.Every sub-pixel are is divided into two parts by the bending portion,and two different aligning liquid crystal domains are created to providewide-viewing angle effect of the LCD. However, the bending portion ispositioned correspondingly to the boundary at different aligning LCdomains, so that the liquid crystal molecules near the bending portionare more disordered than the liquid crystal molecules at the otherportions. Therefore, defects of dark fringes would be easily occurredwhen the pixels are in a white state (ex: a voltage is applied).

Accordingly, several simulation tests are conducted to investigateeffects of the electrode designs on the brightness distribution. Resultsof one set of simulation tests are provided below. It is noted that theelectrode design and the gray scales of the simulation tests are notlisted for limitation but for exemplification; and also, those are notthe best results of the LCD applied by the disclosure can be achieved.

Please refer to FIG. 3A-FIG. 3C and Table 1. FIG. 3A illustrates apattern of the common electrode (Com) of the simulation test accordingto the first embodiment of the disclosure. FIG. 3B illustrates a patternof the common electrode (Com) of the simulation test according to thesecond embodiment of the disclosure. FIG. 3C shows the distributions ofthe gray scales and relative positions according to the commonelectrodes of the first and second embodiments of the disclosure.

In this exemplified simulation test, the relative position A is aposition of 49.25 μm to a reference point, the relative position B is aposition of 56.5 μm to the reference point, the relative position C is aposition of 64 μm to the reference point, and the relative position D isa position of 71.25 μm to the reference point.

In the pattern of common electrode of the second embodiment, thecurving-inward sides (such as the relative positions A-D) of the bendingportions are more gentle than the curving-outward sides, as shown inFIG. 3B. In the practical application, the curving-inward side of thebending portion of the common electrode can further comprise a straightline. In the pattern of common electrode of the first embodiment, bothof the curving-inward sides and the curving-outward sides of the bendingportions are formed of sharp lines, as shown in FIG. 3A. The relativepositions 1-4 denote positions of the dark fringes having extremely lowbrightness, and the relative positions A-D denote positions of thebright fringes having higher brightness. Relationships between the grayscales and relative positions according to the common electrodes of thefirst and second embodiments are presented in FIG. 3C.

TABLE 1 Relative Gray scale of the Gray scale of the Percentage ofposition first embodiment second embodiment increase A 0.193 0.232 20% B0.195 0.280 44% C 0.175 0.263 50% D 0.169 0.249 47%

According to the simulation results of FIG. 3C and Table 1, it isclearly indicated that the gray scales (/brightness) of the samerelative positions of the common electrode of the second embodiment havebeen significantly increased, wherein at least 20% (i.e. the relativeposition A) and up to 50% (i.e. the relative position C) of increasethan that of the first embodiment can be achieved. Therefore, it hasbeen proven that the brightness corresponding to the common electrodecan be effectively increased by adopting the bending portion designhaving more gentle curving-inward side than the curving-outward side asdisclosed by the second embodiment.

In the application of the embodiment, it is noted that other elements ofstructure can be modified and adjusted according to the appliedelectrode design and actual needs of the practical application. Forexample, if the electrode structure is designed to form the bendingportions with the gentle curving-inward sides and the sharpcurving-outward sides for the purpose of increasing the brightness, moreLC molecules at the areas behind the gentle curving-inward sides of thebending portions are twisted with large angle due to the increase ofhorizontal component of alignment behind gentle curving-inward sides,thereby increasing the brightness of those areas. However, the increaseof horizontal component of alignment also leads to the inconsistence ofalignment directions of the LC molecules, so that the press stability ofthe area behind the gentle curving-inward side of the bending portion ispoor. When the area with poor press stability of LCD is touched by thefinger or any exterior object, the region of dark fringes become larger,so that the rotation of the LC molecules at this region are fixed andcan not be well controlled by the electric field during the operation.Thus, it is appropriate to provide a light-shielding pattern capable ofshielding the areas with poor press stability in the practicalapplication.

FIG. 4 is an enlarging drawing of the circling area of FIG. 1. As shownFIG. 4, when the common electrode Com is designed as the electrodestructure of the embodiment of FIG. 3B, the gentle curving-inward sideof the bending portion of the common electrode Com can increase thebrightness, but also create the area with poor press stability (such asa circling area of FIG. 4). The area with poor press stability can beshielded by a light-shielding pattern (such as the black matrix, BM) toreduce the effect of the region of dark fringes on the displayingresult. For example, the gentle curving-inward side of the bendingportion of the ITO Com can be set within the light-shielding pattern BM,as shown in FIG. 4.

FIG. 5 is a top view of a display from the back side of a substrate,which illustrates the display having color resists, conductive wires anda light-shielding pattern according to one embodiment of the disclosure.FIG. 6 is an enlarged view of the rectangular area denoted by the dashedlines of FIG. 5. FIG. 7A depicts a first substrate corresponding to thecurving potion in the circled area of FIG. 6. FIG. 7B depicts a secondsubstrate corresponding to the curving potion in the circled area ofFIG. 6. Please refer to FIG. 5, FIG. 6, FIG. 7A and FIG. 7Bsimultaneously. In the embodiment, a display comprises a first substrate10, a second substrate 20, and a display medium layer such as a liquidcrystal layer disposed between the first substrate 10 and the secondsubstrate 20. The first substrate 10 and the second substrate 20 couldbe a TFT substrate and a CF substrate, respectively. The first substrate10 may further comprise a color resist layer. In one embodiment, thecolor resist layer comprises a first color resist 12 a (ex: green colorresist), a second color resist 12 b (ex: red color resist) and a thirdcolor resist 12 c (ex: blue color resist). A light-shielding pattern 13,such as black matrix (BM), is positioned between the first substrate 10and the second substrate 20. In this embodiment, the light-shieldingpattern 13 is formed at the side of the first substrate 10, as shown inFIG. 7A.

The second substrate 20 opposite to the first substrate 10, and aplurality of conductive wires 21 are formed on the second substrate 20.In one embodiment, the conductive wires 21 are data lines. As shown inFIG. 6 and FIG. 7B, one of the conductive wires 21 is projected onto thelight-shielding pattern 13 along a first direction D1 to obtain aprojected line 21P within the light-shielding pattern 13. As shown inFIG. 5, the projected line 21P of the conductive wire 21 comprises acurved portion (such as the portion in the circled area 30 of FIG. 6),and the curving-inward side (i.e. the side 21P-B) of the curved portionis more gentle than the curving-outward side (i.e. the side 21P-F).Also, the conductive wire 21 can comprise scan lines, and at least oneof the scan lines is projected onto the first substrate 10 along thefirst direction D1 to obtain a projected line extending along a seconddirection D2. As shown in FIG. 5, if those conductive wire 21 are datalines, the data lines are mainly extended along a third direction D3,wherein the third direction D3 is substantially perpendicular to thesecond direction D2, and the data line and the scan line are isolatedlycrossed with each other and define a pixel area. In the followingdescription, the illustrated details of the projected line 21P, theconductive wire 21 and the light-shielding pattern 13 are substantiallypositioned in the region between two adjacent pixel areas.

It is noted that although a color filter substrate including the colorresists is exemplified as the first substrate 10 of the embodiment, thedisclosure is not limited thereto. The disclosure can be applied to thetype of LCD with the second substrate 20 having the color resists andthe conductive wires, such as COA (Color Filter on Array) LCD.

Additionally, although the curving tendency of the data line to that ofthe light-shielding pattern is illustrated for describing theembodiment, the disclosure is not limited thereto. The disclosure can beapplied to other conductive layers (such as ITO) without departing fromthe design spirit of the disclosure. Also, the accompany drawings aresimplified, on the basis of knowledge of the person skilled in therelevant art, to show the related components for clear illustrations ofthe embodiment.

FIG. 8 is an enlarged view of a curved portion in the circled area 30 ofFIG. 6. In one embodiment, the conductive wire 21 is projected onto thelight-shielding pattern 13 along the first direction D1 to obtain theprojected line 21P within the light-shielding pattern 13. The projectedline 21P of the conductive wire 21 comprises a curved portion 211 andtwo extending portions 213 respectively connected to two ends of thecurved portion 211, wherein the concave border 2112 (i.e. thecurving-inward side 21P-B) of the curved portion 211 is more gentle thanthe convex border 2111 (i.e. the curving-outward side 21P-F). Forexample, the concave border 2112 and the convex border 2111 are a smoothcurve and a sharp curve, respectively. Please refer to FIG. 6. In oneembodiment, if a length of a projected line is defined as the distancebetween the first san line SL1 and the second scan line SL2, theprojected line can be divided into seven equal parts, and the middlepart is corresponding to the position of the curved portion 211 whilethe other six parts are corresponding to the two extending portions 213.

In one embodiment, the edge of the light-shielding pattern 13 comprisesa first edge 131 adjacent to the curving-outward side 21P-F (the convexborder 2111) and a second edge 132 adjacent to the curving-inward side21P-B (concave border 2112), and the projected line 21P of theconductive wire 21 is positioned between the first edge 131 and thesecond edge 132 of the light-shielding pattern 13. As shown in FIG. 8, adistance between the first edge 131 of the light-shielding pattern 13and the curved portion 211 of the projected line 21P along the seconddirection D2, such as the distance R1′, is not equal to a distancebetween the first edge 131 of the light-shielding pattern 13 and one ofthe extending portions 213 along the second direction D2, such as thedistance R2′. Similarly, a distance between the second edge 132 of thelight-shielding pattern 13 and the curved portion 211 of the projectedline 21P along the second direction D2, such as the distance R1, is notequal to a distance between the second edge 132 of the light-shieldingpattern 13 and one of the extending portions 213 along the seconddirection D2, such as the distance R2. The first direction D1 isperpendicular to the second direction D2. In one embodiment, the seconddirection D2 is substantially perpendicular to the third direction D3.

According to the embodiment, the distance can be defined as the meaningexpressed below. The distance between the first edge 131 and the curvedportion 211 of the projected line 21P along the second direction D2 isreferred to a distance between the first edge 131 and a convex point ofthe curved portion 211 along the second direction D2. The convex pointis at the convex border 2111 of the curved portion 211, and a tangent ofthe convex border 2111 at the convex point is parallel to the thirddirection D3. Similarly, the distance between the second edge 132 andthe curved portion 211 of the projected line 21P along the seconddirection D2 is referred to a distance between the second edge 132 and aconcave point of the curved portion 211 along the second direction D2.The concave point is at the concave border 2112 of the curved portion211, and a tangent of the concave border 2112 at the concave point isparallel to the third direction D3. Also, the distance between the firstedge 131 and one of the extending portions 213 along the seconddirection D2 is referred to a distance between a point of the first edge131 and the extending portion 213 along the second direction D2. Thedistance between the second edge 132 and one of the extending portions213 along the second direction D2 is referred to a distance between apoint of the second edge 132 and the extending portion 213 along thesecond direction D2.

In one embodiment, there is a distance R1′ between the first edge 131 ofthe light-shielding pattern 13 and the curved portion 211 of theprojected line 21P along the second direction D2, and a distance R2′ isdetermined between the first edge 131 of the light-shielding pattern 13and the extending portion 213 along the second direction D2, wherein thedistance R1′ is shorter than the distance R2′ (R1′<R2′).

In one embodiment, a distance R1 is determined between the second edge132 of the light-shielding pattern 13 and the curved portion 211 of theprojected line 21P along the second direction D2, and a distance R2 isdetermined between the second edge 132 of the light-shielding pattern 13and the extending portion 213 along the second direction D2, wherein thedistance R1 is larger than the distance R2 (R1>R2).

In one embodiment, the distance R1′ between the first edge 131 of thelight-shielding pattern 13 and the curved portion 211 of the projectedline 21P along the second direction D2 is shorter than the distance R1between the second edge 132 and the curved portion 211 along the seconddirection D2.

Also, as shown in FIG. 8, the light-shielding pattern 13 comprises alight-shielding curving portion 13C corresponding to the curved portion211 of the projected line 21P. The first edge 131 comprises a firstcurving rim 131C while the second edge 132 comprises a second curvingrim 132C, and the light-shielding curving portion 13C is positionedbetween the first curving rim and the second curving rim. In theembodiment, the curving tendency of the first curving rim 131C is largerthan the curving tendency of the second curving rim 132C.

Additionally, as shown in FIG. 8, the curved portion 211 of theprojected line 21P has a convex border 2111 and a concave border 2112opposite to the convex border 2111. The curving tendency of the convexborder 2111 can be larger than the curving tendency of the concaveborder 2112. In other words, the curved portion of the conductive wire21 can be configured as a design with the pointed front and theless-arched back. However, the disclosure is not limited thereto.

Also, compared the light-shielding pattern 13 and the conductive wire21, a curving tendency of the light-shielding curving portion 13C of thelight-shielding pattern 13 is smaller than a curving tendency of thecurved portion 211 of the projected line 21P of the conductive wire 21,as shown in FIG. 6 and FIG. 8.

Moreover, the comparison of the curving tendency of the light-shieldingcurving portion 13C of the light-shielding pattern 13 to the curvingtendency of the curved portion 211 of the projected line 21P of theconductive wire 21 can be made by observing the related radiuses ofcurvature.

FIG. 9 is an enlarged view of a light-shielding pattern and a projectedline of the conductive wire according to an embodiment of thedisclosure. The related radiuses of curvature of the light-shieldingpattern and the projected line are also labeled in FIG. 9. Identicalelements of FIG. 9 and FIG. 8 are designed with the same referencenumbers, and the details have been described above and not redundantlydescribed herein. As shown in FIG. 9, the light-shielding pattern 13comprises the light-shielding curving portion 13C, and a rim of thelight-shielding curving portion 13C has a smallest radius of curvatureRc, while a rim of the curved portion 211 of the projected line 21P hasa smallest radius of curvature Rm. In one embodiment, the smallestradius of curvature Rc of the rim of the light-shielding curving portion13C is larger than the smallest radius of curvature Rm of the rim of thecurved portion 211 of the projected line 21P (Rc>Rm).

FIG. 10 is another enlarged view of a light-shielding pattern and aprojected line of the conductive wire according to an embodiment of thedisclosure. Two related radiuses of curvature of the curved portion ofthe projected line are also labeled in FIG. 10. In one embodiment, theconvex border 2111 of the curved portion 211 of the projected line 21Pis configured substantially as a first arc, and the concave border 2112of the curved portion 211 of the projected line 21P is configuredsubstantially as a second arc. As shown in FIG. 10, a radius ofcurvature Rm′ of the first arc is smaller than a radius of curvature Rmof the second arc.

The descriptions above discuss the structures of the light-shieldingpattern 13 and the projected line 21P of the conductive wire 21 of theembodiment. In the application of the LCD having the first substratecomprising color resists (i.e. CF substrate), the conductive wire 21 isalso correspondingly positioned between two adjacent color resists. Asshown in FIG. 6 and FIG. 8, the first substrate 10 comprises a firstcolor resist (ex: green color resist) 12 a and a second color resist(ex: red color resist) 12 b, and the projected line 21P of theconductive wire 21 is positioned between the first color resist 12 a andthe second color resist 12 b. In the following description, the edge ofthe color resist is referred to a boundary between the color resist andthe light-shielding pattern, which can be observed from the back side ofa substrate of a display using an optical microscope.

In one embodiment, a distance between an edge of the second color resist12 b and the curved portion 211 of the projected line 21P along thesecond direction D2, such as the distance R1′, is shorter than adistance between an edge of the first color resist 12 a and the curvedportion 211 of the projected line 21P along the second direction D2,such as the distance R1 (R1′<R1, FIG. 8).

In one embodiment, a distance between an edge of the first color resist12 a and one of the extending portions 213 of the projected line 21Palong the second direction D2, such as the distance R2, is shorter thana distance between the edge of the first color resist 12 a and thecurved portion 211 of the projected line 21P along the second directionD2, such as the distance R1 (R2<R1, FIG. 8).

In one embodiment, a distance between an edge of the second color resist12 b and one of the extending portions 213 of the projected line 21Palong the second direction D2, such as the distance R2′, is larger thana distance between the edge of the second color resist 12 b and thecurved portion 211 of the projected line 21P along the second directionD2, such as the distance R1′ (R2′>R1′, FIG. 8).

According to the embodiment, the distance can be defined as the meaningexpressed below. The distance between the edge of the second colorresist 12 b and the curved portion 211 of the projected line 21P alongthe second direction D2 is referred to a distance between the edge ofthe second color resist 12 b and a convex point of the curved portion211 along the second direction D2. The convex point is at the convexborder 2111 of the curved portion 211, and a tangent of the convexborder 2111 at the convex point is parallel to the third direction D3.Similarly, the distance between the edge of the first color resist 12 aand the curved portion 211 of the projected line 21P along the seconddirection D2 is referred to a distance between the edge of the firstcolor resist 12 a and a concave point of the curved portion 211 alongthe second direction D2. The concave point is at the concave border 2112of the curved portion 211, and a tangent of the concave border 2112 atthe concave point is parallel to the third direction D3. Also, thedistance between the edge of the second color resist 12 b and one of theextending portions 213 along the second direction D2 is referred to adistance between a point of the edge of the second color resist 12 b andthe extending portion 213 along the second direction D2. The distancebetween the edge of the first color resist 12 a and one of the extendingportions 213 along the second direction D2 is referred to a distancebetween a point of the edge of the first color resist 12 a and theextending portion 213 along the second direction D2.

Moreover, related radiuses of curvature can be observed. As shown inFIG. 9, an edge of the first color resist 12 a adjacent to the curvedportion 211 of the projected line 21P has a smallest radius of curvatureRc, and a rim of the curved portion 211 of the projected line 21Padjacent to the first color resist 12 a has a smallest radius ofcurvature Rm. In one embodiment, the smallest radius of curvature Rm ofthe rim of the curved portion 211 is smaller than the smallest radius ofcurvature Rc of an edge of the first color resist 12 a (Rm<Rc).

According to the embodiments, a curved portion of the conductive wire 21is configured to have an inward side with more gentle curvature. Asshown in FIG. 8, the curved portion 211 of the projected line 21P of theconductive wire 21 within the light-shielding pattern 13 comprises theconvex border 2111 and the concave border 2112, wherein the concaveborder 2112 (i.e. the curving-inward side 21P-B) of the curved portion211 is more gentle than the convex border 2111 (i.e. the curving-outwardside 21P-F), so as to present a design with the pointed convex border2111 (with a radius of curvature Rm′) and the less-arched concave border2112 (with a radius of curvature Rm, wherein Rm′<Rm).

According to the aforementioned description, the LCD of the embodimentcomprises the conductive wires and the light-shielding pattern 13 havingcorresponding curved portions with different curving tendencies. In oneembodiment, one side of the curved portion of the conductive wire isless curved than the opposite side; for example, the back side of thecurved portion of the conductive wire is an arc with a larger radius ofcurvature (i.e. less-arched).

While the invention has been described by way of example and in terms ofthe preferred embodiments, it is to be understood that the invention isnot limited thereto. On the contrary, it is intended to cover variousmodifications and similar arrangements and procedures, and the scope ofthe appended claims therefore should be accorded the broadestinterpretation so as to encompass all such modifications and similararrangements and procedures.

What is claimed is:
 1. A display device, comprising: a first substrate;a second substrate comprising a conductive wire; a display medium layer,disposed between the first substrate and the second substrate; and alight-shielding pattern, disposed between the first substrate and thesecond substrate; wherein the conductive wire is projected onto thefirst substrate along a first direction to obtain a projected line, andthe projected line comprises a first border; wherein the light-shieldingpattern comprises a first edge, the first edge comprises a first curvingrim, and the first curving rim is adjacent to the first border.
 2. Thedisplay device according to claim 1, wherein the first edge of thelight-shielding pattern further comprises a first non-curving rimadjacent to the first curving rim, a distance between the first curvingrim and the first border along a second direction is larger than adistance between the first non-curving rim and the first border alongthe second direction, the second direction is different from the firstdirection.
 3. The display device according to claim 1, wherein thelight-shielding pattern further comprises a second edge opposing to thefirst edge, the second edge comprises a second curving rim opposing tothe first curving rim, a curving tendency of the second curving rim isdifferent from a curving tendency of the first curving rim.
 4. Thedisplay device according to claim 3, wherein the curving tendency of thesecond curving rim is larger than the curving tendency of the firstcurving rim.
 5. The display device according to claim 3, wherein theprojected line further comprises a second border opposing to the firstborder, wherein a distance between the second border and the secondcurving rim along a second direction is smaller than a distance betweenthe first border and the first curving rim along the second direction,the second direction is different from the first direction.
 6. Thedisplay device according to claim 5, wherein the second border is aconvex border, and the first border is concave border.
 7. The displaydevice according to claim 1, wherein the projected line furthercomprises a second border opposing to the first border, thelight-shielding pattern further comprises a second edge opposing to thefirst edge, the second edge comprises a second curving rim and a secondnon-curving rim adjacent to the second curving rim, a distance betweenthe second curving rim and the second border along a second direction isdifferent from a distance between the first non-curving rim and thesecond border along the second direction, and the second direction isdifferent from the first direction.
 8. The display device according toclaim 7, wherein the distance between the second curving rim and thesecond border along the second direction is shorter than the distancebetween the first non-curving rim and the second border along the seconddirection.